Paper Title

Experimental investigations of the effect of pilot injection on performance, emissions and combustion characteristics of Karanja biodiesel fuelled CRDI engine

Keywords

  • Pilot Injections
  • Post Injections
  • Diesel Engines
  • Biodiesel
  • Karanja Biodiesel
  • Partial Replacement
  • Compression Ignition Engines
  • Biodiesel Blends
  • Injection Pressures
  • Injection Timings
  • CRDI Engine
  • Multiple Injection Mode
  • Fuel Injection Pressure
  • Start of Pilot Injection
  • SOPI
  • Start of Main Injection
  • SOMI
  • Brake Specific Fuel Consumption
  • BSFC
  • Brake Thermal Efficiency
  • BTE
  • Brake Specific Carbon Monoxide
  • BSCO
  • Brake Specific Hydrocarbon
  • BSHC
  • Brake Specific Nitrogen Oxides
  • BSNOx
  • Combustion Duration
  • Engine Performance
  • Emission Characteristics

Article Type

Research Article

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Issue

Volume : 93 | Page No : 357-366

Published On

March, 2015

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Abstract

Pilot and post injections are being used in modern diesel engines for improving engine performance in addition to meeting stringent emission norms. Biodiesel produced from different feedstocks is gaining global recognition as partial replacement for mineral diesel in compression ignition (CI) engines. In this study, 10%, 20% and 50% Karanja biodiesel blends were used for investigation of pilot injections, injection pressures and injection timings on biodiesel blends. Experiments were carried out in a single cylinder CRDI research engine in multiple injection mode at 500 and 1000 bar fuel injection pressure (FIP) under varying start of pilot injection (SOPI) and start of main injection (SOMI) timings. Brake specific fuel consumption (BSFC) increased with increasing Karanja biodiesel concentration in test fuels however brake thermal efficiency (BTE) of biodiesel blends was slightly higher than mineral diesel. Lower biodiesel blends showed lower brake specific carbon monoxide (BSCO) and brake specific hydrocarbon (BSHC) emissions than mineral diesel. Brake specific nitrogen oxides (BSNOx) emissions from KOME20 and KOME10 were higher than mineral diesel. Combustion duration of KOME50 was also higher than mineral diesel.

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